Territory



{No Model.)

D. IRISH 8v J. Gr. WILLIAMS.

AUTOMATIC CIRCUIT BREAKER.

, No. 492,807. Patented IVIa.1".-7, 1898.

3G If" 1' xr] Il a ul UNITED STATES PATENT OEEICE.

DELOS IRISH AND JOHN G. WILLIAMS, OF SALT LAKE CITY, UTAH TERRITORY; SAID WILLIAMS ASSIGNOR TO SAID IRISH.

AUTOMATIC CIRCUIT-BREAKER.

SPECIFICATION forming part of Letters Patent No. 492,807, dated March '7, 1893.

Application filed September 14, 1892. Serial No. 445,904. (No model.)

To all whom, it may concern:

Beit known that we, DELOS IRISH and JOHN G. WILLIAMS, citizens of the United States, residing at Salt Lake-City, in the county of Salt Lake and Territory of Utah, have invented a new and useful Automatic Circuit- Breaker, of which the following is a specication.

This invention relates to automatic circuitbreakers; and it has for its object to provide an improved automatically operating circuitbreaker which also acts in the capacity of an ordinary circuit-closer, but the same is especially adapted to be used as a safety device for electric motors connected with a main working-circuit, which, in the event of the current being cut-oit at the central station and suddenly switched in again, prevents the current thus suddenly switched in from inj uring the motor by burning the fields, armatures or other part of the motor; and to this end to provide a device capable of use in all analogous connections, and which acts in the capacity of a circuit closer which provides means whereby the circuit can only be closed by the attendant after the current is once cut-oit.

W'ith these and many other objects in View which will readily appear as the nature of the invention is better understood the same consists in the novel construction, combination and arrangement ot parts hereinafter more fully described, illustrated and claimed.

In the accompanying drawingsg--Figure l is a front elevation of a circuit-breaker constructed in accordance with this invention. Fig. 2 is a vertical sectional view of the same on the line 2 2 of Fig. l. Fig. 3 is a similar View on the line 3 3 of Fig. l. Fig. 4 is an enlarged detail end view ot the contacts separated.

Referring to the accompanying drawings 5 A represents the base-board adapted to be secured in a suitable position for supporting the various parts of the circuit closer or breaker. An electro magnet-B is adjustably supported off from the base board A, by the bracket arm O, having an adjustable slot c, working over the securing bolt c', securing the magnet to the board A. The .current from the main working circuit is led through J[he binding post D, to the magnet wire E, connected with said post and leading to the helix of the magnet, the other wire F of which, leads to the slotted ott-standing bracket arm G adj ustably secured to the board A and carrying at its outer end the concaved carbon Contact block H, held stationary oit from said board by means of the arm G. Working directly opposite and adapted to register with 6o the concaved carbon contact block II is the opposite movable convexed carbon contact I. The said convexed contact block I is clamped to the spring arm J, of the coiled spring K,

which tends to normally hold the carbon I below and out of contact with the carbon II. The spring K is secured to the outer end ot' the spring post L secured tothe base board A, which is of suitable non-conducting material,

and further carries upon its outer end the 7o connecting socket M which receives one end of the conducting wire N, and thereby leads the current from the spring to such Wire, which latter is connected to the motor binding post O, to which is connected the wire K holds the spring arm J thereof, normally in 8o a position to hold the carbon I below and out of contact with the carbon I-I, when the circuit is broken, but when the circuit is closed and the current cut onto the instrument, the

carbon I is held into registering contact with 8 5 the stationary carbon I-I, by means of the weighted drop armature I). The drop armature P is clamped at one end in the socket Q, which latter is pivotally connected to the base board A, at a point below the exposed 9o core of the magnet B, so that when the current is passing through the wire E, the ma...- net will hold the weighted drop armature P up to the same in such a position as to hold the carbons in close contact with each other.

The drop armature is adapted to bear under the outer insulated end R of the spring arm J, when the magnet holds the former in its attracted position at approximately right angles to the board A. Immediately upon the rco current being cut oit from the wire l'eading to the herein described circuit-breaker, the

magnet becomes upon that instant demagnetized and therefore allows the Weighted drop armature to fall back against the board A, and the cushion S which breaks the fall of the same. The spring arm J is thereby released and springs down against the stop pin T, projecting from the board A, and thus allows the registering carbons to be immediately thrown out of contact with each other. It will be apparent that even if the current from the central station should be suddenly switched on, the saine cannot pass through the circuit breaker to the machine o1' instrument in connection With which the same is employed, and on the contrary the circuit cannot be again completed or closed until the heavy drop armature is moved up t0 the magnet by the operator.

The many advantages ot the herein described circuit-breaker Will readily suggest themselves to those skilled in the art.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

l. In a circuit-breaker, the combination of an electro magnet arranged in the Working circuit, a Weighted drop armature arranged at one end of the magnet, a stationary contact arranged in the magnet circuit, and a movable spring supported contact adapted to be held normally out ct' contact With the stationary contact and controlled by said drop armature, substantially as set forth.

2. In a circuit breaker', an electro magnet, a Weighted drop armature arranged at one end of the magnet, a stationary contact block, and a movable spring supported contact block adapted to be held in engagement With the stationary block by said drop armature, substantially as set forth.

3. In a circuit breaker, the combination ot the base board, the electro magnet adjustably secured to said base board and arranged in the Working circuit, a Weighted drop armature pivoted at one end to said base board adjacent to one end of the magnet, a stationary bracket arm adjustably secured to the base board adjacent to the magnet, the stationary concaved contact carbon secured to the outer end of the bracket arm, a spring post secured to the base board, a coiled spring secured to the outer end ot said post and provided with a spring arm terminating in an insulated end adapted to be engaged by said drop arma-ture, a concaved contact carbon secured to said spring arm, a stop pin arranged adjacent to the spring arm to limit the saine, and wires leading from the magnet to the stationary bracket arm and from the coiled spring to the line ot use, substantially as set forth.

In testimony that \ve claim the foregoing as our own we have hereto affixed our signatures in the presence of two Witnesses.

DELOS IRISH. JOHN G WILLAMS.

Witnesses:

E. R. KNEAss, JOHN S. BONNER. 

